Chaeles s



(No Model.)

0. S., LEWIS.

ALARM CLOCK.

Iva 293,583.

Patented PebJlZ, 188 i.

CHARLES S. LEIVIS, OF IVATERBURY, CONNECTICUT,

IVATERBURY CLOCK COMPANY, OF SAME PEACE.

ALARlVl-CLOCEQ.

SPECIFICATION forming part of Letters Patent No. 293,583, dated. February 12, 188 1.

Application filed July 80, 1883. (X0 model.)

To aZZ whom it may concern Be it known that I, CHARLES S. LEWIs, of IVaterbury, in the county of New Haven and State of Connecticut, have invented a certain new and useful Improvement in Alarm-Clocks, of which the following is a specification.

This improvement consists in an alarm mechanism involving certain combinations of parts whereby an alarm will be sounded atthe same hour every day for a given number of days with but'one winding.

In the accompanying drawings, Figure 1 is a front view of an alarm mechanism embodying my improvement with the front plate removed. This view also shows part of a time piece whereby the alarm mechanism is controlled. Fi 2 is a side view of the alarm mechanism with the rod that controls the start ing-lever removed. Fig. 3 is a detail view on a larger scale.

Similar letters of reference designate corresponding parts in all the figures.

A designates a shaft or arbor, on which the driving gear-wheel A of the alarm mechanism is mounted. This shaft is journaled in front and back frames, 13 C, which are connected by posts or stretchers D. A convolute spring, E, is coiled around the shaft or arbor A. At one end this spring is fastened to the shaft or arbor, so that the two will turn together, and at the other end it is fastened to one of the posts or stretchers D. On the shaft or arbor A is rigidly affiued a ratchetwheel, A and to the adjacent side of the gear-wheel A is pivoted a pawl, A, that is made resilient or held in engagement with the ratchet-wheel A by a spring. The shaft or arbor may be turned to wind up the spring without affecting the gear-wheel A; but when it is turned in the reverse direction by the unwinding of the spring, the gearwheel A will be turned with it. The gear-wheel A meshes into a pinion, E, which is shown as a lantern-pinion. The shaft of the pinion E is journaled in the frames 13 C, and has mounted on it an escapement or strike wheel, F. This eseapementwheel acts upon an escapement, G, which is mounted on a rock-shaft, G, that has a bell-clappen-G attached to it. The rock-shaft G is journaled in the front and back frames, B C. The bellclapper G may act upon a bell of any suitable kind. The escapemeutwheel F is dogged or blocked by a dog, F, consisting of alever fulcrumed to a shaft, F". At the free end this lever has a nose-piece, a, provided with an in clined under side, against which acts a lug, Z). on a sector, H. The lever also has at or near the free end a forwardly-extending lug, c, that acts against a rearwardly-extending pin, (2, on the escapement-wheel. When the lever F is raised by the action of the pin b of the sector H, the lug c is obtruded into the path of the pin d, so as to prevent further movement of the pin, and consequently to arrest the escapement-wheel. The sector H is mounted loosely upon the shaft or arbor A, and has on its periphery ratchet-teeth 6. Its lug 1) extends between two adjacent arms or spokes of the gear-wheel A.

I designates a lever, which is loosely mounted on the shaft or arbor ii, and having piw oted to one side a pawl, .I, that engages with the ratchet-teeth c of the sector II. A spring, f, fastened to the lever and acting on the pawl, holds the pawl in engagement with the ratchetteeth 6 of the sector. The free end of the lever I, when not otherwise actuated, may be impelled downward by its gravity or a sprin g.

L designates a rod extending from the lever, near its free end, to a ever, )I, which is comprised in a timepiece. This lever M bears against a cam, X, which is arranged upon a sleeve, O, fitting tightly upon asleeve, I, constitutin g the hour-hand arbor ofthe timepiece. The spring K, acting through the rod L, keeps the lever Ill in contact with the cam N. The cam once in each rotation imparts a motion to the' lever L, and through the rod L such motion is transmitted to the lever I. he cam N makes a rotation once in each twelve hours; hence the lever I is operated once in each twelve hours. It is of course undesirable that the alarm mechanism should sound more than once in twenty-four hours; hence the first time the lever I is operated its pawl J only moves the sector a short distance say, for instance, a distance equaling the length of one of its ratchet-teeth. This movement of the sector is insufficient to carry the lug 1) beyond the nose-piece a of the dog F; hence the first time the cam N rotates no alarm will he sounded. The second time the cam rotates the lever I assess will, through its pawl, move the sector H far enough to carry the lug 1) beyond the nosepiece of the dog F. Thereupon the dog falls, its lug c is removed from the path of the pin (1 of the escapement-wheel F, and the latter is free to rotate. As the gear-wheel A rotates, it carries the sector H with it, owing to the projection of the lug b of the sector between adjacent arms or spokes of the gear wheel; On the arrival of the lug b of the sector under the nose-piece of the dog again, the dog is raised, so that its lug a will obtrude itself in the path of the pin (1 of the escapement-wheel, and block the escapement-wheel. It will thus be seen that an alarm will be sounded but once in twenty-four hours, and

that the alarm mechanism may be wound up to run for a number of days-as, for instance, a week.

The alarm mechanism may be made to operate at any desired time by setting the cam N in the proper position. The cam may be set by turning its sleeve 0 upon the hour-hand arbor P. The sleeve may-be advantageously provided with a dial, Q, marked with the numbers of hours, for then all that will be necessary to do will be to adjust the sleeve so that other combinations of parts may be used to subserve the same purpose.

lVhat I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination, with an alarm mechananism and a cam for controlling the release or starting of the same, of means so actuated by the cam that a second rotation of the cam will be necessary to cause the release or starting of the alarm mechanism.

2. The combination, with an alarm mechan' ism and a cam for controlling the release or starting of the same, of means so actuated by the cam that a second rotation of the cam will be necessary to cause the release or starting of the alarm mechanism, and means whereby the alarm mechanism will be blocked after running short periods, substantially as specified.

3. The combination, with an alarm mechanism and a cam controlling the release or starting of the same, of the sector H, lever I, and means for blocking the alarm mechanism, sub stantially as specified.

4. The combination, with an alarm mechanism and a cam controlling the release or starting of the same, of the scctor'H, provided with a lug, b, the lever I, the lever F, provided with a lug, 0, and the escapement or strike wheel,

F of the alarm mechanism, provided with a pin, (Z, substantially as specified.

CHARLES S. LEXVIS.

Witnesses:

H. L. WADE, Gno. A. BnUon. 

